The world's most polluted cities, ranked

478 of 2,622 measured cities in 86 countries breathed air above the WHO 24-hour guideline of 15 µg/m³ over the last 30 days. The worst was Miryang, South Korea, at 307.9.

#118 Cheongsong gun 50.4 µg/m³, more polluted than 95% of 2,622
← Miryang 307.9 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every ranked city, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1MiryangGyeongsangnam-do, South Korea 307.9
  2. 2HwasunJeollanam-do, South Korea 287.9
  3. 3NangenJeollabuk-do, South Korea 248.9
  4. 4SeosanChungcheongnam-do, South Korea 224.6
  5. 5GaigeturiJeju-do, South Korea 195.2
  6. 6Hwaseong-siGyeonggi-do, South Korea 182.7
  7. 7Taesal-liChungcheongnam-do, South Korea 176.6
  8. 8KosongGangwon-do, South Korea 171.4
  9. 9SeogwipoJeju-do, South Korea 168.9
  10. 10AnseongGyeonggi-do, South Korea 165.3
  11. 11SinhyeonGyeongsangnam-do, South Korea 143.3
  12. 12NonsanChungcheongnam-do, South Korea 135.7
  13. 13ChangsuJeollabuk-do, South Korea 128.5
  14. 14MokpoJeollanam-do, South Korea 127.0
  15. 15KimjeJeollabuk-do, South Korea 126.8
  16. 16JeongeupJeollabuk-do, South Korea 125.8
  17. 17HadongGyeongsangnam-do, South Korea 125.3
  18. 18Yangp'yŏngGyeonggi-do, South Korea 124.8
  19. 19CheorwonGangwon-do, South Korea 124.1
  20. 20KunwiGyeongsangbuk-do, South Korea 123.1
  21. 21GeojeGyeongsangnam-do, South Korea 114.3
  22. 22ChinjuGyeongsangnam-do, South Korea 112.5
  23. 23YesanChungcheongnam-do, South Korea 111.3
  24. 24PubalGyeonggi-do, South Korea 110.8
  25. 25BuanJeollabuk-do, South Korea 110.5
  26. 26YeojuGyeonggi-do, South Korea 110.3
  27. 27YŏnmuChungcheongnam-do, South Korea 108.8
  28. 28NamsaJeollabuk-do, South Korea 108.3
  29. 29YangsanGyeongsangnam-do, South Korea 107.0
  30. 30BuyeoChungcheongnam-do, South Korea 106.3
  31. 30HwawŏnDaegu, South Korea 106.3
  32. 32GunsanJeollabuk-do, South Korea 103.3
  33. 33TangjinChungcheongnam-do, South Korea 101.0
  34. 34GangneungGangwon-do, South Korea 99.0
  35. 35Cheongju-siNorth Chungcheong, South Korea 97.1
  36. 36YeonggwangJeollanam-do, South Korea 96.2
  37. 37YecheonGyeongsangbuk-do, South Korea 95.5
  38. 38JungpyongNorth Chungcheong, South Korea 95.3
  39. 39Ganghwa-gunIncheon, South Korea 95.2
  40. 40KoesanNorth Chungcheong, South Korea 95.1
  41. 41GoseongGyeongsangnam-do, South Korea 95.0
  42. 42YeongdongNorth Chungcheong, South Korea 94.9
  43. 42YangjuGyeonggi-do, South Korea 94.9
  44. 42BoryeongChungcheongnam-do, South Korea 94.9
  45. 45JangheungJeollanam-do, South Korea 92.0
  46. 46Jeju CityJeju-do, South Korea 91.9
  47. 47Koch'angJeollabuk-do, South Korea 90.6
  48. 48Icheon-siGyeonggi-do, South Korea 90.5
  49. 49MuanJeollanam-do, South Korea 89.6
  50. 50HongseongChungcheongnam-do, South Korea 89.3
All 2,622 cities
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Who led, day by day

Hwasun2 days #12026-09-02: 424.0 µg/m³2026-09-03: 13.4 µg/m³2026-09-04: 8.0 µg/m³2026-09-05: 422.0 µg/m³, #52026-09-06: 1,260.0 µg/m³, #12026-09-07: 12.2 µg/m³2026-09-08: 11.8 µg/m³2026-09-09: 9.9 µg/m³2026-09-10: 839.0 µg/m³, #42026-09-11: 426.0 µg/m³2026-09-12: 843.0 µg/m³, #22026-09-13: 844.0 µg/m³, #12026-09-14: 845.0 µg/m³, #82026-09-15: 433.0 µg/m³2026-09-16: 15.4 µg/m³2026-09-17: 423.0 µg/m³2026-09-18: 424.0 µg/m³2026-09-19: 425.0 µg/m³, #32026-09-20: 425.0 µg/m³, #32026-09-21: 428.0 µg/m³2026-09-22: 12.6 µg/m³2026-09-23: 12.1 µg/m³2026-09-24: 10.4 µg/m³2026-09-25: 17.3 µg/m³2026-09-26: 5.8 µg/m³2026-09-27: 8.1 µg/m³2026-09-28: 10.8 µg/m³2026-09-29: 10.9 µg/m³2026-09-30: 10.0 µg/m³2026-10-01: 8.3 µg/m³Miryang2 days #12026-09-02: 1,260.0 µg/m³, #32026-09-03: 15.8 µg/m³2026-09-04: 7.3 µg/m³2026-09-05: 5.4 µg/m³2026-09-06: 10.3 µg/m³2026-09-07: 12.5 µg/m³2026-09-08: 7.1 µg/m³2026-09-09: 840.0 µg/m³, #72026-09-10: 423.0 µg/m³2026-09-11: 839.0 µg/m³2026-09-12: 425.0 µg/m³, #52026-09-15: 14.4 µg/m³2026-09-16: 842.0 µg/m³2026-09-17: 5.8 µg/m³2026-09-18: 1,260.0 µg/m³, #12026-09-19: 842.0 µg/m³, #22026-09-20: 842.0 µg/m³, #12026-09-21: 844.0 µg/m³, #72026-09-22: 10.6 µg/m³2026-09-23: 8.0 µg/m³2026-09-24: 15.3 µg/m³2026-09-25: 19.6 µg/m³2026-09-26: 10.2 µg/m³2026-09-27: 11.0 µg/m³2026-09-28: 15.9 µg/m³2026-09-29: 14.0 µg/m³2026-09-30: 9.8 µg/m³2026-10-01: 11.4 µg/m³Gurugram2 days #12026-09-02: 48.7 µg/m³2026-09-03: 46.3 µg/m³2026-09-04: 30.4 µg/m³2026-09-05: 28.9 µg/m³2026-09-06: 33.2 µg/m³2026-09-07: 45.1 µg/m³2026-09-08: 28.8 µg/m³2026-09-09: 52.3 µg/m³2026-09-10: 82.9 µg/m³2026-09-11: 66.4 µg/m³2026-09-12: 33.5 µg/m³2026-09-13: 24.3 µg/m³2026-09-14: 38.2 µg/m³2026-09-15: 44.2 µg/m³2026-09-16: 31.0 µg/m³2026-09-17: 33.4 µg/m³2026-09-18: 34.3 µg/m³2026-09-19: 111.0 µg/m³, #102026-09-20: 122.9 µg/m³, #92026-09-21: 160.5 µg/m³2026-09-22: 165.1 µg/m³, #42026-09-23: 170.0 µg/m³, #12026-09-24: 112.2 µg/m³, #22026-09-25: 47.2 µg/m³2026-09-26: 57.0 µg/m³2026-09-27: 60.9 µg/m³2026-09-28: 104.0 µg/m³, #12026-09-29: 20.5 µg/m³Kinshasa2 days #12026-09-02: 70.1 µg/m³2026-09-03: 43.2 µg/m³2026-09-04: 73.1 µg/m³2026-09-05: 51.9 µg/m³2026-09-06: 78.5 µg/m³2026-09-07: 111.2 µg/m³2026-09-08: 138.0 µg/m³2026-09-09: 58.3 µg/m³2026-09-10: 70.7 µg/m³2026-09-11: 83.0 µg/m³2026-09-12: 70.9 µg/m³2026-09-14: 86.5 µg/m³2026-09-15: 102.1 µg/m³2026-09-16: 51.1 µg/m³2026-09-17: 56.0 µg/m³2026-09-18: 72.4 µg/m³2026-09-19: 71.9 µg/m³2026-09-20: 73.4 µg/m³2026-09-21: 71.2 µg/m³2026-09-23: 113.0 µg/m³, #32026-09-24: 151.0 µg/m³, #12026-09-25: 114.0 µg/m³, #12026-09-26: 65.6 µg/m³2026-09-27: 50.1 µg/m³2026-09-28: 58.2 µg/m³2026-09-30: 75.5 µg/m³, #42026-10-01: 48.5 µg/m³Gujranwala2 days #12026-09-02: 48.3 µg/m³2026-09-03: 50.9 µg/m³2026-09-04: 45.9 µg/m³2026-09-05: 63.5 µg/m³2026-09-06: 51.0 µg/m³2026-09-07: 69.1 µg/m³2026-09-08: 80.0 µg/m³2026-09-09: 65.9 µg/m³2026-09-10: 49.4 µg/m³2026-09-11: 58.0 µg/m³2026-09-12: 59.6 µg/m³2026-09-13: 77.4 µg/m³, #72026-09-14: 46.7 µg/m³2026-09-15: 45.1 µg/m³2026-09-16: 55.2 µg/m³2026-09-17: 34.1 µg/m³2026-09-18: 46.2 µg/m³2026-09-19: 89.2 µg/m³2026-09-20: 87.6 µg/m³2026-09-21: 130.0 µg/m³2026-09-22: 108.5 µg/m³, #62026-09-23: 104.0 µg/m³, #42026-09-24: 96.4 µg/m³, #52026-09-25: 83.0 µg/m³, #62026-09-26: 67.8 µg/m³, #102026-09-27: 105.5 µg/m³, #12026-09-28: 53.9 µg/m³2026-09-29: 52.5 µg/m³2026-09-30: 81.0 µg/m³, #32026-10-01: 104.0 µg/m³, #1Yesan1 day #12026-09-02: 1,270.0 µg/m³, #12026-09-03: 21.0 µg/m³2026-09-04: 7.9 µg/m³2026-09-05: 7.7 µg/m³2026-09-06: 6.2 µg/m³2026-09-07: 8.9 µg/m³2026-09-08: 16.4 µg/m³2026-09-09: 840.0 µg/m³, #62026-09-10: 7.9 µg/m³2026-09-11: 11.0 µg/m³2026-09-12: 22.2 µg/m³2026-09-13: 26.0 µg/m³2026-09-14: 21.9 µg/m³2026-09-15: 11.3 µg/m³2026-09-16: 13.3 µg/m³2026-09-17: 7.6 µg/m³2026-09-18: 840.0 µg/m³, #62026-09-19: 9.9 µg/m³2026-09-20: 14.0 µg/m³2026-09-21: 17.9 µg/m³2026-09-22: 17.3 µg/m³2026-09-23: 19.3 µg/m³2026-09-24: 19.6 µg/m³2026-09-25: 20.5 µg/m³2026-09-26: 10.7 µg/m³2026-09-27: 13.3 µg/m³2026-09-28: 17.0 µg/m³2026-09-29: 18.6 µg/m³2026-09-30: 17.2 µg/m³2026-10-01: 5.8 µg/m³Gaigeturi1 day #12026-09-02: 1,260.0 µg/m³, #52026-09-03: 1,260.0 µg/m³, #12026-09-04: 632.0 µg/m³, #62026-09-05: 5.5 µg/m³2026-09-06: 8.5 µg/m³2026-09-07: 12.3 µg/m³2026-09-08: 9.8 µg/m³2026-09-09: 425.3 µg/m³2026-09-10: 5.7 µg/m³2026-09-11: 215.0 µg/m³2026-09-12: 7.8 µg/m³2026-09-13: 6.6 µg/m³2026-09-14: 1,260.0 µg/m³, #22026-09-15: 8.6 µg/m³2026-09-16: 9.5 µg/m³2026-09-17: 628.3 µg/m³2026-09-18: 5.7 µg/m³2026-09-19: 8.2 µg/m³2026-09-20: 6.8 µg/m³2026-09-21: 11.7 µg/m³2026-09-22: 8.4 µg/m³2026-09-23: 6.3 µg/m³2026-09-24: 9.3 µg/m³2026-09-25: 9.7 µg/m³2026-09-26: 5.5 µg/m³2026-09-27: 3.7 µg/m³2026-09-28: 6.7 µg/m³2026-09-29: 5.6 µg/m³2026-09-30: 7.3 µg/m³2026-10-01: 6.4 µg/m³Yecheon1 day #12026-09-02: 421.0 µg/m³2026-09-03: 6.3 µg/m³2026-09-04: 1,260.0 µg/m³, #12026-09-05: 5.0 µg/m³2026-09-06: 7.6 µg/m³2026-09-07: 10.0 µg/m³2026-09-08: 10.3 µg/m³2026-09-09: 5.7 µg/m³2026-09-10: 5.8 µg/m³2026-09-11: 7.4 µg/m³2026-09-12: 9.0 µg/m³2026-09-13: 11.3 µg/m³2026-09-15: 14.5 µg/m³2026-09-16: 843.0 µg/m³2026-09-17: 5.9 µg/m³2026-09-18: 8.4 µg/m³2026-09-19: 8.1 µg/m³2026-09-20: 7.9 µg/m³2026-09-21: 12.0 µg/m³2026-09-22: 9.8 µg/m³2026-09-23: 8.3 µg/m³2026-09-24: 15.3 µg/m³2026-09-25: 17.8 µg/m³2026-09-26: 9.2 µg/m³2026-09-27: 8.5 µg/m³2026-09-28: 12.2 µg/m³2026-09-29: 10.0 µg/m³2026-09-30: 10.9 µg/m³2026-10-01: 8.4 µg/m³Cheorwon1 day #12026-09-02: 427.0 µg/m³2026-09-03: 13.0 µg/m³2026-09-04: 10.4 µg/m³2026-09-05: 1,260.0 µg/m³, #12026-09-06: 5.6 µg/m³2026-09-07: 1,050.5 µg/m³, #32026-09-08: 12.5 µg/m³2026-09-09: 217.2 µg/m³2026-09-10: 8.4 µg/m³2026-09-11: 11.2 µg/m³2026-09-12: 16.8 µg/m³2026-09-13: 17.5 µg/m³2026-09-14: 19.3 µg/m³2026-09-15: 13.5 µg/m³2026-09-16: 12.4 µg/m³2026-09-17: 11.4 µg/m³2026-09-18: 218.6 µg/m³2026-09-19: 12.4 µg/m³2026-09-20: 13.7 µg/m³2026-09-21: 224.2 µg/m³2026-09-22: 20.0 µg/m³2026-09-23: 18.5 µg/m³2026-09-24: 19.9 µg/m³2026-09-25: 12.5 µg/m³2026-09-26: 7.7 µg/m³2026-09-27: 15.8 µg/m³2026-09-28: 16.9 µg/m³2026-09-29: 12.5 µg/m³2026-09-30: 15.5 µg/m³2026-10-01: 9.5 µg/m³T’aebaek1 day #12026-09-02: 419.0 µg/m³2026-09-03: 3.7 µg/m³2026-09-04: 3.3 µg/m³2026-09-05: 2.3 µg/m³2026-09-06: 4.1 µg/m³2026-09-07: 1,260.0 µg/m³, #12026-09-08: 4.4 µg/m³2026-09-09: 3.1 µg/m³2026-09-10: 2.7 µg/m³2026-09-11: 3.0 µg/m³2026-09-12: 3.5 µg/m³2026-09-13: 8.5 µg/m³2026-09-14: 11.1 µg/m³2026-09-15: 9.0 µg/m³2026-09-16: 7.3 µg/m³2026-09-17: 3.1 µg/m³2026-09-18: 3.5 µg/m³2026-09-19: 5.0 µg/m³2026-09-20: 6.3 µg/m³2026-09-21: 6.9 µg/m³2026-09-22: 5.4 µg/m³2026-09-23: 4.6 µg/m³2026-09-24: 10.0 µg/m³2026-09-25: 9.3 µg/m³2026-09-26: 4.4 µg/m³2026-09-27: 4.4 µg/m³2026-09-28: 8.6 µg/m³2026-09-29: 4.8 µg/m³2026-09-30: 7.6 µg/m³2026-10-01: 9.0 µg/m³Sep 2Oct 1
Every city that was the world's most polluted on at least one of the last 30 days. Filled square: #1 that day; ring: in the top 10; dot: measured but lower. Each city's own local day.

The world's air, last 30 days

2026-09-02: 126 of 2638 cities extremely poor (5%)2026-09-02: 3 of 2638 cities very poor (0%)2026-09-02: 15 of 2638 cities poor (1%)2026-09-02: 302 of 2638 cities moderate (11%)2026-09-02: 1302 of 2638 cities fair (49%)2026-09-02: 890 of 2638 cities good (34%)Sep 22026-09-03: 23 of 2661 cities extremely poor (1%)2026-09-03: 2 of 2661 cities very poor (0%)2026-09-03: 20 of 2661 cities poor (1%)2026-09-03: 305 of 2661 cities moderate (11%)2026-09-03: 1241 of 2661 cities fair (47%)2026-09-03: 1070 of 2661 cities good (40%)2026-09-04: 17 of 2654 cities extremely poor (1%)2026-09-04: 24 of 2654 cities poor (1%)2026-09-04: 313 of 2654 cities moderate (12%)2026-09-04: 1042 of 2654 cities fair (39%)2026-09-04: 1258 of 2654 cities good (47%)2026-09-05: 14 of 2665 cities extremely poor (1%)2026-09-05: 1 of 2665 cities very poor (0%)2026-09-05: 19 of 2665 cities poor (1%)2026-09-05: 325 of 2665 cities moderate (12%)2026-09-05: 990 of 2665 cities fair (37%)2026-09-05: 1316 of 2665 cities good (49%)2026-09-06: 11 of 2454 cities extremely poor (0%)2026-09-06: 6 of 2454 cities very poor (0%)2026-09-06: 16 of 2454 cities poor (1%)2026-09-06: 285 of 2454 cities moderate (12%)2026-09-06: 1051 of 2454 cities fair (43%)2026-09-06: 1085 of 2454 cities good (44%)2026-09-07: 23 of 2634 cities extremely poor (1%)2026-09-07: 3 of 2634 cities very poor (0%)2026-09-07: 28 of 2634 cities poor (1%)2026-09-07: 290 of 2634 cities moderate (11%)2026-09-07: 1094 of 2634 cities fair (42%)2026-09-07: 1196 of 2634 cities good (45%)Sep 72026-09-08: 12 of 2595 cities extremely poor (0%)2026-09-08: 3 of 2595 cities very poor (0%)2026-09-08: 34 of 2595 cities poor (1%)2026-09-08: 318 of 2595 cities moderate (12%)2026-09-08: 1329 of 2595 cities fair (51%)2026-09-08: 899 of 2595 cities good (35%)2026-09-09: 32 of 2629 cities extremely poor (1%)2026-09-09: 4 of 2629 cities very poor (0%)2026-09-09: 34 of 2629 cities poor (1%)2026-09-09: 317 of 2629 cities moderate (12%)2026-09-09: 1077 of 2629 cities fair (41%)2026-09-09: 1165 of 2629 cities good (44%)2026-09-10: 22 of 2575 cities extremely poor (1%)2026-09-10: 3 of 2575 cities very poor (0%)2026-09-10: 27 of 2575 cities poor (1%)2026-09-10: 324 of 2575 cities moderate (13%)2026-09-10: 1009 of 2575 cities fair (39%)2026-09-10: 1190 of 2575 cities good (46%)2026-09-11: 31 of 2408 cities extremely poor (1%)2026-09-11: 1 of 2408 cities very poor (0%)2026-09-11: 25 of 2408 cities poor (1%)2026-09-11: 325 of 2408 cities moderate (13%)2026-09-11: 1006 of 2408 cities fair (42%)2026-09-11: 1020 of 2408 cities good (42%)2026-09-12: 6 of 2483 cities extremely poor (0%)2026-09-12: 3 of 2483 cities very poor (0%)2026-09-12: 23 of 2483 cities poor (1%)2026-09-12: 339 of 2483 cities moderate (14%)2026-09-12: 1333 of 2483 cities fair (54%)2026-09-12: 779 of 2483 cities good (31%)2026-09-13: 5 of 2299 cities extremely poor (0%)2026-09-13: 1 of 2299 cities very poor (0%)2026-09-13: 22 of 2299 cities poor (1%)2026-09-13: 376 of 2299 cities moderate (16%)2026-09-13: 1067 of 2299 cities fair (46%)2026-09-13: 828 of 2299 cities good (36%)2026-09-14: 17 of 2453 cities extremely poor (1%)2026-09-14: 3 of 2453 cities very poor (0%)2026-09-14: 19 of 2453 cities poor (1%)2026-09-14: 361 of 2453 cities moderate (15%)2026-09-14: 973 of 2453 cities fair (40%)2026-09-14: 1080 of 2453 cities good (44%)Sep 142026-09-15: 22 of 2548 cities extremely poor (1%)2026-09-15: 4 of 2548 cities very poor (0%)2026-09-15: 20 of 2548 cities poor (1%)2026-09-15: 356 of 2548 cities moderate (14%)2026-09-15: 1136 of 2548 cities fair (45%)2026-09-15: 1010 of 2548 cities good (40%)2026-09-16: 35 of 2623 cities extremely poor (1%)2026-09-16: 2 of 2623 cities very poor (0%)2026-09-16: 36 of 2623 cities poor (1%)2026-09-16: 350 of 2623 cities moderate (13%)2026-09-16: 1158 of 2623 cities fair (44%)2026-09-16: 1042 of 2623 cities good (40%)2026-09-17: 23 of 2605 cities extremely poor (1%)2026-09-17: 2 of 2605 cities very poor (0%)2026-09-17: 29 of 2605 cities poor (1%)2026-09-17: 305 of 2605 cities moderate (12%)2026-09-17: 1288 of 2605 cities fair (49%)2026-09-17: 958 of 2605 cities good (37%)2026-09-18: 23 of 2687 cities extremely poor (1%)2026-09-18: 18 of 2687 cities poor (1%)2026-09-18: 303 of 2687 cities moderate (11%)2026-09-18: 1437 of 2687 cities fair (53%)2026-09-18: 906 of 2687 cities good (34%)2026-09-19: 9 of 2687 cities extremely poor (0%)2026-09-19: 1 of 2687 cities very poor (0%)2026-09-19: 39 of 2687 cities poor (1%)2026-09-19: 287 of 2687 cities moderate (11%)2026-09-19: 1479 of 2687 cities fair (55%)2026-09-19: 872 of 2687 cities good (32%)2026-09-20: 7 of 2423 cities extremely poor (0%)2026-09-20: 4 of 2423 cities very poor (0%)2026-09-20: 45 of 2423 cities poor (2%)2026-09-20: 259 of 2423 cities moderate (11%)2026-09-20: 1059 of 2423 cities fair (44%)2026-09-20: 1049 of 2423 cities good (43%)2026-09-21: 27 of 2553 cities extremely poor (1%)2026-09-21: 7 of 2553 cities very poor (0%)2026-09-21: 42 of 2553 cities poor (2%)2026-09-21: 285 of 2553 cities moderate (11%)2026-09-21: 955 of 2553 cities fair (37%)2026-09-21: 1237 of 2553 cities good (48%)Sep 212026-09-22: 4 of 2629 cities extremely poor (0%)2026-09-22: 6 of 2629 cities very poor (0%)2026-09-22: 61 of 2629 cities poor (2%)2026-09-22: 293 of 2629 cities moderate (11%)2026-09-22: 1178 of 2629 cities fair (45%)2026-09-22: 1087 of 2629 cities good (41%)2026-09-23: 1 of 2686 cities extremely poor (0%)2026-09-23: 10 of 2686 cities very poor (0%)2026-09-23: 59 of 2686 cities poor (2%)2026-09-23: 308 of 2686 cities moderate (11%)2026-09-23: 1318 of 2686 cities fair (49%)2026-09-23: 990 of 2686 cities good (37%)2026-09-24: 1 of 2702 cities extremely poor (0%)2026-09-24: 6 of 2702 cities very poor (0%)2026-09-24: 44 of 2702 cities poor (2%)2026-09-24: 399 of 2702 cities moderate (15%)2026-09-24: 1358 of 2702 cities fair (50%)2026-09-24: 894 of 2702 cities good (33%)2026-09-25: 3 of 2660 cities very poor (0%)2026-09-25: 28 of 2660 cities poor (1%)2026-09-25: 395 of 2660 cities moderate (15%)2026-09-25: 1429 of 2660 cities fair (54%)2026-09-25: 805 of 2660 cities good (30%)2026-09-26: 2 of 2667 cities very poor (0%)2026-09-26: 28 of 2667 cities poor (1%)2026-09-26: 316 of 2667 cities moderate (12%)2026-09-26: 1528 of 2667 cities fair (57%)2026-09-26: 793 of 2667 cities good (30%)2026-09-27: 2 of 2558 cities very poor (0%)2026-09-27: 23 of 2558 cities poor (1%)2026-09-27: 296 of 2558 cities moderate (12%)2026-09-27: 1398 of 2558 cities fair (55%)2026-09-27: 839 of 2558 cities good (33%)2026-09-28: 1 of 2637 cities very poor (0%)2026-09-28: 22 of 2637 cities poor (1%)2026-09-28: 328 of 2637 cities moderate (12%)2026-09-28: 1485 of 2637 cities fair (56%)2026-09-28: 801 of 2637 cities good (30%)Sep 282026-09-29: 1 of 2672 cities very poor (0%)2026-09-29: 28 of 2672 cities poor (1%)2026-09-29: 376 of 2672 cities moderate (14%)2026-09-29: 1434 of 2672 cities fair (54%)2026-09-29: 833 of 2672 cities good (31%)2026-09-30: 1 of 2422 cities very poor (0%)2026-09-30: 15 of 2422 cities poor (1%)2026-09-30: 244 of 2422 cities moderate (10%)2026-09-30: 1514 of 2422 cities fair (63%)2026-09-30: 648 of 2422 cities good (27%)2026-10-01: 1 of 1464 cities very poor (0%)2026-10-01: 8 of 1464 cities poor (1%)2026-10-01: 169 of 1464 cities moderate (12%)2026-10-01: 904 of 1464 cities fair (62%)2026-10-01: 382 of 1464 cities good (26%)Oct 1
Each day's ranked cities split by band, worst at the top: a taller red and purple share means a worse day for more of the world, not just one city.

Climbing fastest

Movement shows once the board is a day old.

Cleanest air

Cities with reference monitors only.

What's missing

We rank only cities whose monitor data we're allowed to reuse. The government monitoring networks of China and Turkey publish no terms that allow this, so we leave them out: most cities there are missing here, not clean. The few of their cities that appear are measured by community low-cost sensors, tagged as such. Why.

Use this board

SmogRank, most polluted cities, PM2.5, last 30 days to 2 Oct 2026, 07:00 UTC, smogrank.com/?w=30d.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.